tl;dr - No, they are not suitable.
I can tell you that now from experience and without even looking at the code that the answer to any question that begins "is my crypto..." will always be that it is NOT secure.
Crypto.StackExchange has a lengthy and detailed answer on why shouldn't we roll our own crypto why shouldn't we roll our own crypto - typically people fall into one of a handful of logical bear traps, such as believing they have some scheme that they managed to come up with something that teams of people who've studied the problems for decades have missed.
Crypto is really, really, hard and unless you know exactly what you're doing then anything security related which you have written yourself will definitely be insufficient. Think about it this way, OpenSSL contained serious flaws for decades before anyone saw them so even if there were no flaws found here in coedreview, you'd need trained professionals to spot the problem areas.
tl;dr - No, they are not suitable.
I can tell you that now from experience and without even looking at the code that the answer to any question that begins "is my crypto..." will always be that it is NOT secure.
Crypto.StackExchange has a lengthy and detailed answer on why shouldn't we roll our own crypto - typically people fall into one of a handful of logical bear traps, such as believing they have some scheme that they managed to come up with something that teams of people who've studied the problems for decades have missed.
Crypto is really, really, hard and unless you know exactly what you're doing then anything security related which you have written yourself will definitely be insufficient. Think about it this way, OpenSSL contained serious flaws for decades before anyone saw them so even if there were no flaws found here in coedreview, you'd need trained professionals to spot the problem areas.
tl;dr - No, they are not suitable.
I can tell you that now from experience and without even looking at the code that the answer to any question that begins "is my crypto..." will always be that it is NOT secure.
Crypto.StackExchange has a lengthy and detailed answer on why shouldn't we roll our own crypto - typically people fall into one of a handful of logical bear traps, such as believing they have some scheme that they managed to come up with something that teams of people who've studied the problems for decades have missed.
Crypto is really, really, hard and unless you know exactly what you're doing then anything security related which you have written yourself will definitely be insufficient. Think about it this way, OpenSSL contained serious flaws for decades before anyone saw them so even if there were no flaws found here in coedreview, you'd need trained professionals to spot the problem areas.
tl;dr - No, they are not suitable.
I can tell you that now from experience and without even looking at the code that the answer to any question that begins "is my crypto..." will always be that it is NOT secure.
Crypto.StackExchange has a lengthy and detailed answer on why shouldn't we roll our own crypto - typically people fall into one of a handful of logical bear traps, such as believing they have some scheme that they managed to come up with something that teams of people who've studied the problems for decades have missed.
Crypto is really, really, hard and unless you know exactly what you're doing then anything security related which you have written yourself will definitely be insufficient. Think about it this way, OpenSSL contained serious flaws for decades before anyone saw them so even if there were no flaws found here in coedreview, you'd need trained professionals to spot the problem areas.